/Engine/Source/Runtime/Experimental/Chaos/Public/Chaos/Collision/ContactTriangles.h
Get the positions of the other two vertices in the triangle. (VertexIndex is an index into the owning mesh's vertices)
bool GetOtherVertexPositions ( const int32 VertexIndex, [FVec3](API\Runtime\ChaosCore\Chaos\FVec3) & OutVertex0, [FVec3](API\Runtime\ChaosCore\Chaos\FVec3) & OutVertex1 ) const